If the Football Association confirms his registration, he will be available for Sunday's FA Cup tie at Tottenham.

"I watch a lot of football. The way Leicester play suits my style," said the England U-20 player.

Bournemouth were also said to be interested in the highly-rated teenager, who burst onto the scene with a hat-trick against Reading in December 2014.

Gray came through the Blues' youth system and made 78 senior appearances for the club, scoring eight goals.

Demarai Gray on Instagram: "Small message to Birmingham for everything. Been at the club since 10 years old and loved every moment there. Forever in my heart and thank every member of staff that I've worked with."

Birmingham manager Gary Rowett confirmed Demarai Gray was in talks with a Premier League club after the Blues' 2-1 win over Brentford on Saturday